Can someone share the latest SGH-I257 AT&T Modem?

[Galaxyninja66]

If you have an SGH-I257 on the latest AT&T firmware/modem you can back it up via twrp. I'd appreciate it a lot if you guys shared that with me :3

 

[BeyondDNA2021]

I thought there wasn't a method for installing TWRP on the SGH-I257? I'd love to be able to put TWRP on it. If I could use TWRP to share the latest AT&T firmware/modem, I would do it. I'm pretty ignorant with this stuff though...